Steam boiler



H. J. KERR STEAM BOILER June 7, 1932.

2 Sheets-Sheet Filed April 26. 1928 INVENTOR .7

ATTORNEYS June 7,1932. J KERR 1,861,965

STEAM BOILER Filed April 26, 1928 2 Sheets-Sheet 2 Fig-,2

JW a INVENTOR BY jaw W ATTORNEY;

Patented June 7, 1932 UNITED STATES PATENT OFFICE HOWARD J. KERR, OF WESTFIEL'D, NEW JERSEY, ASSIGNOR TO BABCOCK & WILCOX COMPANY, OF BAYONNE- NEW JERSEY, A. CORPORATION OF NEW JERSEY STEAM BOILER Application filed April 26,

This invention relates to a boiler of the Babcock & Wilcox type, having a furnace that is provided with wall cooling tubes connected to the boiler headers so that these tubes will not become dry even when the water level in the boiler is below the bottom of the steam and water drum. The invention will be understood from the description in connection with the accompanying drawings in which Fig. l

represents a vertical section through an illustrative embodiment of the invention; and Fig. 2 is a plan view partly in section taken along the line 22 of Fig. 1.

In the drawings reference character 5 indicates a chain grate stoker located beneath the furnace 6 of the boiler. The boiler is located above the furnace and comprises the usual steam and water drum 7, downtake headers 8, uptake headers 9, and inclined tubes 10 connecting the headers 8 and 9.

The headers are connected to the steam and water drum in the usual well known manner.

A group of tubes 11' extends from the water space of the steam and water drum 7 to corre- 25 sponding headers 12 that are vertically disposed and located near the ends of the drum 7. Pipes 13 connect the headers 12 to lower headers 14. A pipe 15 extends from each header 14 along opposite sides of the furnace to the ends of a horizontal header 16 located in front of the furnace. A row of tubes 17 extends inwardly and then upwardly from the header 16 along the furnace arch 17 and front wall of the furnace to an upper header 18. Pipes 19 extend from near opposite ends of the header 18 to the steam space of the steam and water drum 7.

A pipe 20 extends from each header 14 to a horizontal water box 21 located near the rear end of the stoker 5 and above the same. row of tubes 22 extends from the water boX .21 inwardly and upwardly along the furnace arch 22 and rear furnace wall to an upper header 23. Pipes 24 extend from near 0pposite ends of the header 23 to the steam space of the steam and water drum 7.

Pipes 25 extend from each header 14 to the rear end of the side wall water boxes 26 for the stoker. The boxes 26 slope upwardly v from the rear to the front and the front ends 1928. Serial No. 272,932.

' steam and water drum 7.

By this invention steam pockets that might otherwise form in the upper ends of the sloping boxes 26 are avoided. The danger of the water wall tubes running dry is also eliminated even when the water level in the boiler becomes low. These advantages are due to the fact that the water boxes 26 are connected to the headers 9 and water can pass from the headers to the boxes even when the water level is below the bottom of the steam and water drum 7. In such a case, the direction of flow of water through the pipes 27 will, of course, be reversed while supplying water to the boxes 26 and furnace wall cooling tubes.

I claim:

1. In a boiler having vertically disposed headers, a furnace, furnace wall cooling tubes, side wall Water boxes inclined to the horizontal, and located at the lower portion of said furnace, said'tubes beingconnected directly to said boxes, and connections from the lower portion of some of said headers to the upper ends of said water boxes.

2. In a boiler, a furnace, inclined water boxes at the lower portion of said furnace, furnace wall tubes directly connected to said boxes, vertically disposed boiler headers, connections from the upper portions of said boxes to the lower portions of some of said boiler headers, a steam and water drum, and connections from said drum to the lower portion of said boxes. I k

3. In a boiler having a steam and water drum and vertically disposed headers connected to said drum, a furnace, water boxes 7 for said furnace directly connected at one of their ends to said headers and at their other ends to said drum, and furnace wall tubes having their lower ends connected to said boxes. t

4. In a boiler having a steam and water drum and vertically disposed headers connected to said drum, a furnace, water boxes for said furnace sloping from one end to the l other, connections from said drum to the 5 lower ,ends of said boxes and direct connections from the up' er ends of said boxes to said headers, and

mace wall tubes having their lower ends connected to said boxes.

HQWARD KERR. 

